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adj.上下起伏的；来来往往的；变动的；垂直的
1、up down up up down───向上向下向上向下
2、walk up and down───来回走着
3、peduncle up and down───花梗上下
4、bounce up and down───跳上跳下；上下弹跳
5、running up and down───连串升降
6、up and down───上上下下; 起落；上上下下；到处；前前后后；来来往往
7、down and down───一败涂地
8、bumping up and down───上下颠簸
9、teeming up and down───大起大落
1、He jigged up and down with excitement.───他激动得又蹦又跳。
2、My relationship with him was up and down.───我跟他的关系忽冷忽热。
3、I place the tip of the cane on the underside of your cock and slide it up and down the shaft. It gently taps on your balls.───我将藤条的末端放在你的YinJing上，然后轻轻的滑动一下，它便上下抖动起来。
4、Russian soldiers were trampling up and down on the corpses, dragging their latest victims into position like butchers in an abattoir.───EGuo士兵踩在尸体上像屠宰场的屠夫一样把刚刚遇害的人拖到坑里。
5、At least then I could run up and down the dirt roads with someone, and we could chase squirrels and stalk deer together.───那样，我至少可以有个伴和我一起在泥土路上来回跑，我们还可以一起追赶松鼠，悄悄地跟踪山鹿。
6、He looked up and down the rain-swept street.───他上下大量着下着大雨的街道。
7、The momentary elation evaporated as he turned to look up and down the corridor.───他转身上下打量着这走廊的时候，瞬间的喜悦顷刻消失了。
8、My daughter spent much of today riding her bike up and down our street with my hubby next to her, one hand on her shoulder.───女儿今天花了很长时间骑着自行车在我家附近的街上来来HuiHui，丈夫则一直在她的身边，一只手扶着她的肩膀。
9、It has been a bit up and down all the way to here, from my side and from the team's side, but I think that could have been expected.───比赛一路走来到这里，从我和车队的角度来说，事情有些起起伏伏。但我认为这是本应该被预料到的事情。
1、The up-and-down movements help obtain a round turn.
2、Each time, after three or four up-and-down cycles, she begins to use her other hand.
3、In most studies, encapsulation bras reduce up-and-down breast bounce best, particularly for large-breasted women, but are rated the least comfortable bra, which matters.
4、Too much up-and-down movement is wasted energy and can be hard on yourlower body.
5、Late trias, the up-and-down configurations of Ordovician weathered crust peak are high on the west-north and low on the east-south, oil-gas moved to west-north.
6、In an up-and-down life, including a brush with cocaine in the 1980s that wiped out his finances and got him convicted for armed robbery, it was hard to quit.
7、These ideas are favored because such actions required up-and-down motions of the arm, and fossil evidence indicates that the dino king was incapable of rotating or twisting its arms.
8、With a tanking economy, up-and-down stock markets, ever growing unemployment, all this doom and gloom leaves us broke and depressed.
9、Thus, little of this up-and-down movement is Carried to the car frame , Body, and passengers.